JPH0119632Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is equipped with a combine harvester, more specifically, a stem culm pulling device, in which the stem culm pulled up by the pulling device is reaped by a cutting blade, and the cutting speed of the stem culm is variable. Regarding the combine harvester.

Generally, the stem culm pulling device of a combine harvester is fixed to the machine body and cannot be adjusted to change the angle. The posture in which the stem culm is pulled up by the device changes, and the posture in which the stem culm is conveyed by the conveying device also changes, causing fluctuations in the insertion depth of the stem culm into the conveying device, that is, the handling depth, and the threshing process. This adversely affects performance.

That is, the drive system for the pulling device and the cutting blade is the same, and therefore, if the cutting speed of the cutting blade is made high, the lifting speed of the pulling device will also be high, and the cutting speed will be faster than normal. The culm is pulled up at a high speed, and the angle of the culm to the ground is tilted as large as possible.Also, if the cutting speed of the cutting blade is made slow, the pulling speed of the pulling device will also be slow, which is normal. Since the stem culm is pulled up at a slower speed than usual, the angle of the stem culm with respect to the ground is inclined as small as possible, and in this way, the lifting posture of the stem culm changes depending on the cutting speed of the cutting blade.

As previously disclosed in Japanese Utility Model Publication No. 53-49708, the applicant of the present invention linked the stem culm pulling device and the traveling device of a combine harvester, and the said culm pulling device is linked to the traveling device of the combine, and the said raising device is operated in accordance with the traveling speed of the traveling device. Therefore, we proposed a combine harvester in which the inclination angle of the device could be changed.However, in such a combine harvester, it is possible to change the cutting speed of the cutting blade depending on the condition of the stem culm, regardless of the running speed. In such cases, the conventional combine harvester could not deal with such cases.

This invention was devised in view of the above problems, and by changing the inclination angle of the stem culm lifting device in accordance with the cutting speed of the cutting blade, the drawing posture of the stem culm can be kept constant. It is something that should be kept in mind.

More specifically, the stem culm pulling device is supported such that its angle relative to the ground can be changed, and the stem culm pulling device is linked to a reaping speed adjusting device, so that when the reaping speed is increased, the stem culm pulling device is The vehicle is characterized by a small angle to the ground, which increases during deceleration.

The combine harvester of the present invention will be explained below with reference to the drawings.

The combine shown in the drawing has a traveling device 2 in the lower part of the machine body 1, a threshing part 3 in the upper part, and a reaping part 4 in the front part of the machine body 1. A stem culm pulling device 5 which is internally configured to circulate and drive a plurality of tines 5b;
It consists of a cutting blade 7 supported by a support rod 6 extending forward from the machine body 1 and a grass division plate 8, and the cutting blade 7 and the pulling device 5 are driven by the same drive source.

Therefore, the lifting case 5a of the lifting device 5
is supported so that its angle relative to the ground can be changed, and specifically, the lower part of the case 5a is supported on the back side of the case 5a by a protruding rod 9 protruding from the support rod 6 via a bracket 10 so as to be able to swing freely. At the same time, two rods 11 support the upper part of the back side of the case 5a in a freely swingable manner on the case 5a and the body 1 side, respectively, and one is inserted into the other to be freely expandable and retractable.
a, 11b, and this rod 11a, 1
By expanding and contracting 1b, the case 5a is swung about the bracket 10 as a fulcrum, and the angle relative to the ground can be changed.

The pulling device 5 is linked to the reaping speed adjusting device of the cutting blade 7, so that the angle to the ground of the pulling device 5 is small when the cutting speed is increased, and becomes large when the cutting speed is decelerated.

Specifically, this is done as shown in FIGS. 2 to 8, and in the embodiment shown in these figures, the lifting device 5 is linked to the cutting speed of the cutting blade 7 and the traveling speed of the traveling device 2, respectively. I'm looking forward to it.

That is, as is clear from Fig. 2, a first operating lever 1 for adjusting the cutting speed is located near the operator's seat of the combine.
2 and a second operation lever 13 for adjusting traveling speed are swingably supported on the same axis rod 14, and the levers 12 and 13 are inserted through guide holes 15a and 15b extending in the front and rear direction formed in the machine wall. In addition to protruding outward, there are elongated holes 16a, 16a, 16a, 16a, 16b, 16a, 16a, 16b, 16b, 16a, 16b, 16b, 16b, 16b, 16b, 16b, 16b, 16b, 16b, 16b, 16a, 16b, 16b, 16b, 16b, 16b, 16a, 16b, 16a, 16b, 16a, 16b, 16a, 16a, 16a, 16a, 16a, 16a, 16a, 16a, 16a, and elongate holes 16a, 16a, 16a, 16a, 16b, 16a,
Connecting plate 16 with 16b is connected to each elongated hole 16a, 16
b is inserted into each of the levers 12 and 13 and supported, while a rod 18 is connected to the center of the connecting plate 16 via a bracket 17, and the rod 1
8 is connected to the upper part of the rear side of the lifting case 5a.

The guide hole 15a of the first operating lever 12 has a neutral position N ₁ at the middle, a low speed position L ₁ at the front, and a high speed position H ₁ at the rear. , the middle part is in the neutral position
N ₂ , front side is high speed position H ₂ , rear side is low speed position L ₂
It is said that

In this way, each of the levers 12 and 13 is placed in the neutral position.
From N ₁ and N ₂ , as shown in _FIG .
3 to the high speed position _H2 , the connecting plate 16
Push the rod 18 and lift the case 5.
a as shown in FIG. 7, and the levers 12 and 13 are moved to low speed positions L ₁ and L ₂ , respectively, as shown in FIG. 5.
Alternatively, when the case 5a is moved obliquely to the high speed positions H ₁ and H ₂ , the rod 18 is held at the neutral position without being pushed, and the case 5a is placed in the neutral state. as shown in Figure 6, on the rear side, that is, the first lever 1.
2 to the high speed position _H1 and the second operating lever 13 to the low speed position _L2 , the rod 18 is pulled rearward by the connecting plate 16, and the case 5a is moved to a small ground angle as shown in FIG. The inclination should be adjusted as much as possible.

In the embodiment shown in FIG. 2, each lever 12, 13
are supported on the same axis 14, and each lever 1
2 and 13, each has a shaft rod 14 as shown in Figure 9.
It can also be supported via a and 14b.

Further, as shown in FIGS. 10 and 11, the tilting case 5a may be adjusted in inclination using an operating section using a hydraulic mechanism linked to a reaping and traveling speed adjusting device.

That is, the tip of a piston rod 20 extending outward from the cylinder 19 is connected to the upper rear side of the case 5a, and a 4-port 3-position electromagnetic switching valve 21 is connected to the cylinder 19.
The piston rod 20 may be operated by the first switching operation to adjust the inclination angle of the case 5a.

In this case, as shown in FIG. 11, the switches SW-L ₁ and SW-H ₂ which respectively adjust the reaping speed to the low speed side and the running speed to the high speed side are connected to one solenoid SOL- of the switching valve 21. These switches are connected in series to the connection circuit that operates R.
The ON operation of SW-L ₁ and SW-H ₂ causes the solenoid SOL-R to operate the switching valve 21, move the rod 20 forward, and lift the case 5.
Adjust a as much as possible to make the angle above the ground as large as possible.
In addition, switches SW-H ₁ and SW- are provided to adjust the reaping speed to the high speed side and the traveling speed to the low speed side, respectively.
L ₂ is the other solenoid SOL- of the switching valve 21.
L is connected in series to the connecting circuit for operating the rod 20, and when the switches SW-H ₁ and SW-L ₂ are turned on, the solenoid SOL-L is operated to switch the switching valve 21, and the rod 20 is switched backward. By moving the case 5a to the side, the case 5a is adjusted to have as small an angle with respect to the ground as possible.

Furthermore, in the present invention, as shown in FIG.
The back pressure sides of the cylinders 22a, 23a in each device 22, 23 are communicated with each other, and the other side of each cylinder 22a, 23a is connected to the 4-port 3-position switching valve 24. By switching the switching valve 24, each of the cylinders 22
The angle of the case 5a relative to the ground may be adjusted by moving the piston rods 22b and 23b of the stems a and 23a forward and backward. Reaping work can be carried out by holding the culm lifting device 5 in a predetermined inclined position.

In addition, 25 in the figure is a grain culm conveying device provided between the reaping section 4 and the threshing section 3.

The present invention is constructed as described above, and when the first and second operating levers 12 and 13 are held in a neutral state as shown in FIG. The levers 12 and 13 are connected to each guide hole 15 as shown in FIG.
a, 15b low speed position L ₁ , L ₂ or high speed position
When the grain culm pulling device 5 is moved to H ₁ or H ₂ and reaping work is performed at low or high reaping speed and traveling speed, the grain culm pulling device 5 is held at a predetermined inclination angle without adjusting the inclination. , the stem culm is raised in a predetermined inclined position, and normal reaping work is performed.

When the first and second levers 12 and 13 are moved to the front side L ₁ and H ₂ of each guide hole 15a and 15b as shown in FIG. 4, the cutting speed of the cutting blade 7 is reduced to a low speed. In addition, the traveling speed is switched to high speed, and at this time, the movement of the levers 12 and 13 causes the lifting device 5 to be
However, as shown in FIG. 7, the inclination is adjusted to make the angle from the ground as large as possible.

When performing reaping work in this way, since the driving source for the cutting blade 7 and the pulling device 5 is the same, the pulling speed of the pulling device 5 also becomes low due to the low speed adjustment of the cutting blade 7. Therefore, if the cutting operation is performed without adjusting the angle of the pulling device 5, the stem culm will come into contact with the pulling device 5 as shown by line A in Figure 7. The lifting distance until cutting by the cutting blade 7 is smaller than the normal time described above, and the blade is raised in an inclined position with a small angle to the ground, but the lifting device 5 is adjusted in inclination so that the angle to the ground is large. Therefore, the high position of the pulling device 5 comes into contact with the stem culm, and the pulling action on the stem culm is performed from the high position of the pulling device 5. Therefore, the pulling device 5
Even though the lifting speed is slow, the stem culm is pulled up in the same tilted posture as in the normal case described above.

In addition, as _shown in FIG _.
When the mowing blade 7 is moved to a high speed, the cutting speed of the cutting blade 7 is changed to a high speed, and the running speed is changed to a low speed.
As shown in FIG. 8, the inclination of the lifting device 5 is adjusted to make the angle from the ground as small as possible.

When performing reaping work in this way, the hoisting speed of the hoisting device 5 becomes high due to the high-speed adjustment of the cutting blade 7, and therefore, if the mowing work is carried out without adjusting the angle of the hoisting device 5, , the stem culm is brought into contact with the lifting device 5 as shown by line B in FIG.
The lifting distance until cutting by the cutting blade 7 is longer than the normal time described above, and the lifting device 5 is raised in an inclined position with a large angle to the ground.
Since the angle from the ground is adjusted to be as small as possible, the lower part of the pulling device 5 comes into contact with the stem culm, and the pulling action on the stem culm is performed from the lower part of the pulling device 5. Even though the pulling speed of the pulling device 5 is high,
The stem culm is raised in the same tilted position as in the normal situation described above.

The stem culm raised by the pulling device 5 as described above is transported to the threshing section 3 by the transport device 25 and is threshed.

As explained above, in the combine harvester of this invention,
The stem culm pulling device is supported so that its angle relative to the ground can be changed, and the pulling device is linked to a reaping speed adjusting device so that the angle relative to the ground of the said pulling device is small when the reaping speed is increased, and becomes large when the reaping speed is decelerated. Since the adjustment was made, the raised posture of the stem culm can always be kept constant regardless of whether the reaping speed is increased or decreased. This allows the threshing section to perform good threshing work without causing changes in posture or in the handling depth of the threshing section.

[Brief explanation of the drawing]

Figure 1 is a side view of the combine harvester according to the present invention;
FIG. 2 is a perspective view of the operation lever part, FIGS. 3 to 6 are diagrams of the operating state of the lever, and FIGS. 7 and 8 are diagrams of the operating state of the stem culm pulling device by the lever,
9 to 12 are drawings showing other embodiments. 5... Stem culm pulling device, 7... Cutting blade.

Claims (1)

[Scope of utility model registration request] A combine harvester equipped with a stem culm pulling device, in which the stem culm pulled up by the pulling device is reaped by a cutting blade, and the cutting speed of the stem culm is variable, the angle of the stem culm pulling device relative to the ground can be changed. The stem culm pulling device is linked to a reaping speed adjusting device, so that when the reaping speed is increased, the angle of the stem culm pulling device to the ground is made smaller, and when the reaping speed is decelerated, it is increased. A combine harvester.